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# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

module Elasticsearch
  module API
    module Indices
      module Actions
        # Returns settings for one or more indices.
        #
        # @option arguments [List] :index A comma-separated list of index names; use `_all` or empty string to perform the operation on all indices
        # @option arguments [List] :name The name of the settings that should be included
        # @option arguments [Time] :master_timeout Specify timeout for connection to master
        # @option arguments [Boolean] :ignore_unavailable Whether specified concrete indices should be ignored when unavailable (missing or closed)
        # @option arguments [Boolean] :allow_no_indices Whether to ignore if a wildcard indices expression resolves into no concrete indices. (This includes `_all` string or when no indices have been specified)
        # @option arguments [String] :expand_wildcards Whether to expand wildcard expression to concrete indices that are open, closed or both. (options: open, closed, hidden, none, all)
        # @option arguments [Boolean] :flat_settings Return settings in flat format (default: false)
        # @option arguments [Boolean] :local Return local information, do not retrieve the state from master node (default: false)
        # @option arguments [Boolean] :include_defaults Whether to return all default setting for each of the indices.
        # @option arguments [Hash] :headers Custom HTTP headers
        #
        # @see https://www.elastic.co/guide/en/elasticsearch/reference/7.x/indices-get-settings.html
        #
        def get_settings(arguments = {})
          headers = arguments.delete(:headers) || {}

          arguments = arguments.clone

          _index = arguments.delete(:index)

          _name = arguments.delete(:name)

          method = Elasticsearch::API::HTTP_GET
          path   = if _index && _name
                     "#{Utils.__listify(_index)}/_settings/#{Utils.__listify(_name)}"
                   elsif _index
                     "#{Utils.__listify(_index)}/_settings"
                   elsif _name
                     "_settings/#{Utils.__listify(_name)}"
                   else
                     "_settings"
                   end
          params = Utils.__validate_and_extract_params arguments, ParamsRegistry.get(__method__)

          body = nil
          perform_request(method, path, params, body, headers).body
        end

        # Register this action with its valid params when the module is loaded.
        #
        # @since 6.2.0
        ParamsRegistry.register(:get_settings, [
          :master_timeout,
          :ignore_unavailable,
          :allow_no_indices,
          :expand_wildcards,
          :flat_settings,
          :local,
          :include_defaults
        ].freeze)
      end
    end
  end
end